Choroidal dystrophy, central areolar 2

Central areolar choroidal dystrophy-2 (CACD2) is a hereditary retinal disorder that principally affects the macula, often resulting in a well-defined area of atrophy of the retinal pigment epithelium (RPE) and choriocapillaris in the center of the macula. Dysfunction of macular photoreceptors usually leads to a decrease in visual acuity, generally occurring between the ages of 30 and 60 years (summary by Boon et al., 2009). For a discussion of genetic heterogeneity of central areolar choroidal dystrophy, see CACD1 (215500). [from OMIM]